To enhance the stability of the micro-grid when switching to an island state, a two-layer control strategy is studied. The first layer consisting of continuous local controllers controls each distributed power unit, which is designed by means of the linear matrix equation technique based on Lyapunov theory, and through adjusting the set point of distributed power subsystem, achieves the best performance and suitable running index. The second layer is coordinated through decentralized supervisory control, the decentralized supervisory control is built on the basis of information fusion, which used wide area measurement system, and in the case of large distribution, the subsystem is converted into a proper operating state. Simulation results show that the transient stability of microgrid in the pre-planned or accidental cases are greatly improved.